summaryrefslogtreecommitdiff
path: root/sound/soc/intel/atom/sst-mfld-platform-pcm.c
blob: f5a8050351b53a0fdfc60af61a176cf3e60b08a2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
/*
 *  sst_mfld_platform.c - Intel MID Platform driver
 *
 *  Copyright (C) 2010-2014 Intel Corp
 *  Author: Vinod Koul <vinod.koul@intel.com>
 *  Author: Harsha Priya <priya.harsha@intel.com>
 *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; version 2 of the License.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/slab.h>
#include <linux/io.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/compress_driver.h>
#include <asm/platform_sst_audio.h>
#include "sst-mfld-platform.h"
#include "sst-atom-controls.h"

struct sst_device *sst;
static DEFINE_MUTEX(sst_lock);

int sst_register_dsp(struct sst_device *dev)
{
	if (WARN_ON(!dev))
		return -EINVAL;
	if (!try_module_get(dev->dev->driver->owner))
		return -ENODEV;
	mutex_lock(&sst_lock);
	if (sst) {
		dev_err(dev->dev, "we already have a device %s\n", sst->name);
		module_put(dev->dev->driver->owner);
		mutex_unlock(&sst_lock);
		return -EEXIST;
	}
	dev_dbg(dev->dev, "registering device %s\n", dev->name);
	sst = dev;
	mutex_unlock(&sst_lock);
	return 0;
}
EXPORT_SYMBOL_GPL(sst_register_dsp);

int sst_unregister_dsp(struct sst_device *dev)
{
	if (WARN_ON(!dev))
		return -EINVAL;
	if (dev != sst)
		return -EINVAL;

	mutex_lock(&sst_lock);

	if (!sst) {
		mutex_unlock(&sst_lock);
		return -EIO;
	}

	module_put(sst->dev->driver->owner);
	dev_dbg(dev->dev, "unreg %s\n", sst->name);
	sst = NULL;
	mutex_unlock(&sst_lock);
	return 0;
}
EXPORT_SYMBOL_GPL(sst_unregister_dsp);

static struct snd_pcm_hardware sst_platform_pcm_hw = {
	.info =	(SNDRV_PCM_INFO_INTERLEAVED |
			SNDRV_PCM_INFO_DOUBLE |
			SNDRV_PCM_INFO_PAUSE |
			SNDRV_PCM_INFO_RESUME |
			SNDRV_PCM_INFO_MMAP|
			SNDRV_PCM_INFO_MMAP_VALID |
			SNDRV_PCM_INFO_BLOCK_TRANSFER |
			SNDRV_PCM_INFO_SYNC_START),
	.buffer_bytes_max = SST_MAX_BUFFER,
	.period_bytes_min = SST_MIN_PERIOD_BYTES,
	.period_bytes_max = SST_MAX_PERIOD_BYTES,
	.periods_min = SST_MIN_PERIODS,
	.periods_max = SST_MAX_PERIODS,
	.fifo_size = SST_FIFO_SIZE,
};

static struct sst_dev_stream_map dpcm_strm_map[] = {
	{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, /* Reserved, not in use */
	{MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA1_IN, SST_TASK_ID_MEDIA, 0},
	{MERR_DPCM_COMPR, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA0_IN, SST_TASK_ID_MEDIA, 0},
	{MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_CAPTURE, PIPE_PCM1_OUT, SST_TASK_ID_MEDIA, 0},
	{MERR_DPCM_DEEP_BUFFER, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA3_IN, SST_TASK_ID_MEDIA, 0},
};

static int sst_media_digital_mute(struct snd_soc_dai *dai, int mute, int stream)
{

	return sst_send_pipe_gains(dai, stream, mute);
}

/* helper functions */
void sst_set_stream_status(struct sst_runtime_stream *stream,
					int state)
{
	unsigned long flags;
	spin_lock_irqsave(&stream->status_lock, flags);
	stream->stream_status = state;
	spin_unlock_irqrestore(&stream->status_lock, flags);
}

static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
{
	int state;
	unsigned long flags;

	spin_lock_irqsave(&stream->status_lock, flags);
	state = stream->stream_status;
	spin_unlock_irqrestore(&stream->status_lock, flags);
	return state;
}

static void sst_fill_alloc_params(struct snd_pcm_substream *substream,
				struct snd_sst_alloc_params_ext *alloc_param)
{
	unsigned int channels;
	snd_pcm_uframes_t period_size;
	ssize_t periodbytes;
	ssize_t buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
	u32 buffer_addr = virt_to_phys(substream->dma_buffer.area);

	channels = substream->runtime->channels;
	period_size = substream->runtime->period_size;
	periodbytes = samples_to_bytes(substream->runtime, period_size);
	alloc_param->ring_buf_info[0].addr = buffer_addr;
	alloc_param->ring_buf_info[0].size = buffer_bytes;
	alloc_param->sg_count = 1;
	alloc_param->reserved = 0;
	alloc_param->frag_size = periodbytes * channels;

}
static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
				struct snd_sst_stream_params *param)
{
	param->uc.pcm_params.num_chan = (u8) substream->runtime->channels;
	param->uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits;
	param->uc.pcm_params.sfreq = substream->runtime->rate;

	/* PCM stream via ALSA interface */
	param->uc.pcm_params.use_offload_path = 0;
	param->uc.pcm_params.reserved2 = 0;
	memset(param->uc.pcm_params.channel_map, 0, sizeof(u8));

}

static int sst_get_stream_mapping(int dev, int sdev, int dir,
	struct sst_dev_stream_map *map, int size)
{
	int i;

	if (map == NULL)
		return -EINVAL;


	/* index 0 is not used in stream map */
	for (i = 1; i < size; i++) {
		if ((map[i].dev_num == dev) && (map[i].direction == dir))
			return i;
	}
	return 0;
}

int sst_fill_stream_params(void *substream,
	const struct sst_data *ctx, struct snd_sst_params *str_params, bool is_compress)
{
	int map_size;
	int index;
	struct sst_dev_stream_map *map;
	struct snd_pcm_substream *pstream = NULL;
	struct snd_compr_stream *cstream = NULL;

	map = ctx->pdata->pdev_strm_map;
	map_size = ctx->pdata->strm_map_size;

	if (is_compress == true)
		cstream = (struct snd_compr_stream *)substream;
	else
		pstream = (struct snd_pcm_substream *)substream;

	str_params->stream_type = SST_STREAM_TYPE_MUSIC;

	/* For pcm streams */
	if (pstream) {
		index = sst_get_stream_mapping(pstream->pcm->device,
					  pstream->number, pstream->stream,
					  map, map_size);
		if (index <= 0)
			return -EINVAL;

		str_params->stream_id = index;
		str_params->device_type = map[index].device_id;
		str_params->task = map[index].task_id;

		str_params->ops = (u8)pstream->stream;
	}

	if (cstream) {
		index = sst_get_stream_mapping(cstream->device->device,
					       0, cstream->direction,
					       map, map_size);
		if (index <= 0)
			return -EINVAL;
		str_params->stream_id = index;
		str_params->device_type = map[index].device_id;
		str_params->task = map[index].task_id;

		str_params->ops = (u8)cstream->direction;
	}
	return 0;
}

static int sst_platform_alloc_stream(struct snd_pcm_substream *substream,
		struct snd_soc_dai *dai)
{
	struct sst_runtime_stream *stream =
			substream->runtime->private_data;
	struct snd_sst_stream_params param = {{{0,},},};
	struct snd_sst_params str_params = {0};
	struct snd_sst_alloc_params_ext alloc_params = {0};
	int ret_val = 0;
	struct sst_data *ctx = snd_soc_dai_get_drvdata(dai);

	/* set codec params and inform SST driver the same */
	sst_fill_pcm_params(substream, &param);
	sst_fill_alloc_params(substream, &alloc_params);
	substream->runtime->dma_area = substream->dma_buffer.area;
	str_params.sparams = param;
	str_params.aparams = alloc_params;
	str_params.codec = SST_CODEC_TYPE_PCM;

	/* fill the device type and stream id to pass to SST driver */
	ret_val = sst_fill_stream_params(substream, ctx, &str_params, false);
	if (ret_val < 0)
		return ret_val;

	stream->stream_info.str_id = str_params.stream_id;

	ret_val = stream->ops->open(sst->dev, &str_params);
	if (ret_val <= 0)
		return ret_val;


	return ret_val;
}

static void sst_period_elapsed(void *arg)
{
	struct snd_pcm_substream *substream = arg;
	struct sst_runtime_stream *stream;
	int status;

	if (!substream || !substream->runtime)
		return;
	stream = substream->runtime->private_data;
	if (!stream)
		return;
	status = sst_get_stream_status(stream);
	if (status != SST_PLATFORM_RUNNING)
		return;
	snd_pcm_period_elapsed(substream);
}

static int sst_platform_init_stream(struct snd_pcm_substream *substream)
{
	struct sst_runtime_stream *stream =
			substream->runtime->private_data;
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	int ret_val;

	dev_dbg(rtd->dev, "setting buffer ptr param\n");
	sst_set_stream_status(stream, SST_PLATFORM_INIT);
	stream->stream_info.period_elapsed = sst_period_elapsed;
	stream->stream_info.arg = substream;
	stream->stream_info.buffer_ptr = 0;
	stream->stream_info.sfreq = substream->runtime->rate;
	ret_val = stream->ops->stream_init(sst->dev, &stream->stream_info);
	if (ret_val)
		dev_err(rtd->dev, "control_set ret error %d\n", ret_val);
	return ret_val;

}

static int power_up_sst(struct sst_runtime_stream *stream)
{
	return stream->ops->power(sst->dev, true);
}

static void power_down_sst(struct sst_runtime_stream *stream)
{
	stream->ops->power(sst->dev, false);
}

static int sst_media_open(struct snd_pcm_substream *substream,
		struct snd_soc_dai *dai)
{
	int ret_val = 0;
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct sst_runtime_stream *stream;

	stream = kzalloc(sizeof(*stream), GFP_KERNEL);
	if (!stream)
		return -ENOMEM;
	spin_lock_init(&stream->status_lock);

	/* get the sst ops */
	mutex_lock(&sst_lock);
	if (!sst ||
	    !try_module_get(sst->dev->driver->owner)) {
		dev_err(dai->dev, "no device available to run\n");
		ret_val = -ENODEV;
		goto out_ops;
	}
	stream->ops = sst->ops;
	mutex_unlock(&sst_lock);

	stream->stream_info.str_id = 0;

	stream->stream_info.arg = substream;
	/* allocate memory for SST API set */
	runtime->private_data = stream;

	ret_val = power_up_sst(stream);
	if (ret_val < 0)
		return ret_val;

	/* Make sure, that the period size is always even */
	snd_pcm_hw_constraint_step(substream->runtime, 0,
			   SNDRV_PCM_HW_PARAM_PERIODS, 2);

	return snd_pcm_hw_constraint_integer(runtime,
			 SNDRV_PCM_HW_PARAM_PERIODS);
out_ops:
	kfree(stream);
	mutex_unlock(&sst_lock);
	return ret_val;
}

static void sst_media_close(struct snd_pcm_substream *substream,
		struct snd_soc_dai *dai)
{
	struct sst_runtime_stream *stream;
	int ret_val = 0, str_id;

	stream = substream->runtime->private_data;
	power_down_sst(stream);

	str_id = stream->stream_info.str_id;
	if (str_id)
		ret_val = stream->ops->close(sst->dev, str_id);
	module_put(sst->dev->driver->owner);
	kfree(stream);
}

static int sst_media_prepare(struct snd_pcm_substream *substream,
		struct snd_soc_dai *dai)
{
	struct sst_runtime_stream *stream;
	int ret_val = 0, str_id;

	stream = substream->runtime->private_data;
	str_id = stream->stream_info.str_id;
	if (stream->stream_info.str_id) {
		ret_val = stream->ops->stream_drop(sst->dev, str_id);
		return ret_val;
	}

	ret_val = sst_platform_alloc_stream(substream, dai);
	if (ret_val <= 0)
		return ret_val;
	snprintf(substream->pcm->id, sizeof(substream->pcm->id),
			"%d", stream->stream_info.str_id);

	ret_val = sst_platform_init_stream(substream);
	if (ret_val)
		return ret_val;
	substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
	return ret_val;
}

static int sst_media_hw_params(struct snd_pcm_substream *substream,
				struct snd_pcm_hw_params *params,
				struct snd_soc_dai *dai)
{
	snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
	memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
	return 0;
}

static int sst_media_hw_free(struct snd_pcm_substream *substream,
		struct snd_soc_dai *dai)
{
	return snd_pcm_lib_free_pages(substream);
}

static int sst_enable_ssp(struct snd_pcm_substream *substream,
			struct snd_soc_dai *dai)
{
	int ret = 0;

	if (!dai->active) {
		ret = sst_handle_vb_timer(dai, true);
		sst_fill_ssp_defaults(dai);
	}
	return ret;
}

static int sst_be_hw_params(struct snd_pcm_substream *substream,
				struct snd_pcm_hw_params *params,
				struct snd_soc_dai *dai)
{
	int ret = 0;

	if (dai->active == 1)
		ret = send_ssp_cmd(dai, dai->name, 1);
	return ret;
}

static int sst_set_format(struct snd_soc_dai *dai, unsigned int fmt)
{
	int ret = 0;

	if (!dai->active)
		return 0;

	ret = sst_fill_ssp_config(dai, fmt);
	if (ret < 0)
		dev_err(dai->dev, "sst_set_format failed..\n");

	return ret;
}

static int sst_platform_set_ssp_slot(struct snd_soc_dai *dai,
			unsigned int tx_mask, unsigned int rx_mask,
			int slots, int slot_width) {
	int ret = 0;

	if (!dai->active)
		return ret;

	ret = sst_fill_ssp_slot(dai, tx_mask, rx_mask, slots, slot_width);
	if (ret < 0)
		dev_err(dai->dev, "sst_fill_ssp_slot failed..%d\n", ret);

	return ret;
}

static void sst_disable_ssp(struct snd_pcm_substream *substream,
			struct snd_soc_dai *dai)
{
	if (!dai->active) {
		send_ssp_cmd(dai, dai->name, 0);
		sst_handle_vb_timer(dai, false);
	}
}

static struct snd_soc_dai_ops sst_media_dai_ops = {
	.startup = sst_media_open,
	.shutdown = sst_media_close,
	.prepare = sst_media_prepare,
	.hw_params = sst_media_hw_params,
	.hw_free = sst_media_hw_free,
	.mute_stream = sst_media_digital_mute,
};

static struct snd_soc_dai_ops sst_compr_dai_ops = {
	.mute_stream = sst_media_digital_mute,
};

static struct snd_soc_dai_ops sst_be_dai_ops = {
	.startup = sst_enable_ssp,
	.hw_params = sst_be_hw_params,
	.set_fmt = sst_set_format,
	.set_tdm_slot = sst_platform_set_ssp_slot,
	.shutdown = sst_disable_ssp,
};

static struct snd_soc_dai_driver sst_platform_dai[] = {
{
	.name = "media-cpu-dai",
	.ops = &sst_media_dai_ops,
	.playback = {
		.stream_name = "Headset Playback",
		.channels_min = SST_STEREO,
		.channels_max = SST_STEREO,
		.rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
	},
	.capture = {
		.stream_name = "Headset Capture",
		.channels_min = 1,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
	},
},
{
	.name = "deepbuffer-cpu-dai",
	.ops = &sst_media_dai_ops,
	.playback = {
		.stream_name = "Deepbuffer Playback",
		.channels_min = SST_STEREO,
		.channels_max = SST_STEREO,
		.rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
	},
},
{
	.name = "compress-cpu-dai",
	.compress_new = snd_soc_new_compress,
	.ops = &sst_compr_dai_ops,
	.playback = {
		.stream_name = "Compress Playback",
		.channels_min = 1,
	},
},
/* BE CPU  Dais */
{
	.name = "ssp0-port",
	.ops = &sst_be_dai_ops,
	.playback = {
		.stream_name = "ssp0 Tx",
		.channels_min = SST_STEREO,
		.channels_max = SST_STEREO,
		.rates = SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
	.capture = {
		.stream_name = "ssp0 Rx",
		.channels_min = SST_STEREO,
		.channels_max = SST_STEREO,
		.rates = SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
},
{
	.name = "ssp1-port",
	.ops = &sst_be_dai_ops,
	.playback = {
		.stream_name = "ssp1 Tx",
		.channels_min = SST_STEREO,
		.channels_max = SST_STEREO,
		.rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
	.capture = {
		.stream_name = "ssp1 Rx",
		.channels_min = SST_STEREO,
		.channels_max = SST_STEREO,
		.rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
},
{
	.name = "ssp2-port",
	.ops = &sst_be_dai_ops,
	.playback = {
		.stream_name = "ssp2 Tx",
		.channels_min = SST_STEREO,
		.channels_max = SST_STEREO,
		.rates = SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
	.capture = {
		.stream_name = "ssp2 Rx",
		.channels_min = SST_STEREO,
		.channels_max = SST_STEREO,
		.rates = SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
},
};

static int sst_platform_open(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime;

	if (substream->pcm->internal)
		return 0;

	runtime = substream->runtime;
	runtime->hw = sst_platform_pcm_hw;
	return 0;
}

static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
					int cmd)
{
	int ret_val = 0, str_id;
	struct sst_runtime_stream *stream;
	int status;
	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	dev_dbg(rtd->dev, "sst_platform_pcm_trigger called\n");
	if (substream->pcm->internal)
		return 0;
	stream = substream->runtime->private_data;
	str_id = stream->stream_info.str_id;
	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		dev_dbg(rtd->dev, "sst: Trigger Start\n");
		status = SST_PLATFORM_RUNNING;
		stream->stream_info.arg = substream;
		ret_val = stream->ops->stream_start(sst->dev, str_id);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		dev_dbg(rtd->dev, "sst: in stop\n");
		status = SST_PLATFORM_DROPPED;
		ret_val = stream->ops->stream_drop(sst->dev, str_id);
		break;
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	case SNDRV_PCM_TRIGGER_SUSPEND:
		dev_dbg(rtd->dev, "sst: in pause\n");
		status = SST_PLATFORM_PAUSED;
		ret_val = stream->ops->stream_pause(sst->dev, str_id);
		break;
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	case SNDRV_PCM_TRIGGER_RESUME:
		dev_dbg(rtd->dev, "sst: in pause release\n");
		status = SST_PLATFORM_RUNNING;
		ret_val = stream->ops->stream_pause_release(sst->dev, str_id);
		break;
	default:
		return -EINVAL;
	}

	if (!ret_val)
		sst_set_stream_status(stream, status);

	return ret_val;
}


static snd_pcm_uframes_t sst_platform_pcm_pointer
			(struct snd_pcm_substream *substream)
{
	struct sst_runtime_stream *stream;
	int ret_val, status;
	struct pcm_stream_info *str_info;
	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	stream = substream->runtime->private_data;
	status = sst_get_stream_status(stream);
	if (status == SST_PLATFORM_INIT)
		return 0;
	str_info = &stream->stream_info;
	ret_val = stream->ops->stream_read_tstamp(sst->dev, str_info);
	if (ret_val) {
		dev_err(rtd->dev, "sst: error code = %d\n", ret_val);
		return ret_val;
	}
	substream->runtime->delay = str_info->pcm_delay;
	return str_info->buffer_ptr;
}

static const struct snd_pcm_ops sst_platform_ops = {
	.open = sst_platform_open,
	.ioctl = snd_pcm_lib_ioctl,
	.trigger = sst_platform_pcm_trigger,
	.pointer = sst_platform_pcm_pointer,
};

static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_soc_dai *dai = rtd->cpu_dai;
	struct snd_pcm *pcm = rtd->pcm;
	int retval = 0;

	if (dai->driver->playback.channels_min ||
			dai->driver->capture.channels_min) {
		retval =  snd_pcm_lib_preallocate_pages_for_all(pcm,
			SNDRV_DMA_TYPE_CONTINUOUS,
			snd_dma_continuous_data(GFP_DMA),
			SST_MIN_BUFFER, SST_MAX_BUFFER);
		if (retval) {
			dev_err(rtd->dev, "dma buffer allocationf fail\n");
			return retval;
		}
	}
	return retval;
}

static int sst_soc_probe(struct snd_soc_platform *platform)
{
	struct sst_data *drv = dev_get_drvdata(platform->dev);

	drv->soc_card = platform->component.card;
	return sst_dsp_init_v2_dpcm(platform);
}

static struct snd_soc_platform_driver sst_soc_platform_drv  = {
	.probe		= sst_soc_probe,
	.ops		= &sst_platform_ops,
	.compr_ops	= &sst_platform_compr_ops,
	.pcm_new	= sst_pcm_new,
};

static const struct snd_soc_component_driver sst_component = {
	.name		= "sst",
};


static int sst_platform_probe(struct platform_device *pdev)
{
	struct sst_data *drv;
	int ret;
	struct sst_platform_data *pdata;

	drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
	if (drv == NULL) {
		return -ENOMEM;
	}

	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
	if (pdata == NULL) {
		return -ENOMEM;
	}

	pdata->pdev_strm_map = dpcm_strm_map;
	pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map);
	drv->pdata = pdata;
	drv->pdev = pdev;
	mutex_init(&drv->lock);
	dev_set_drvdata(&pdev->dev, drv);

	ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
	if (ret) {
		dev_err(&pdev->dev, "registering soc platform failed\n");
		return ret;
	}

	ret = snd_soc_register_component(&pdev->dev, &sst_component,
				sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
	if (ret) {
		dev_err(&pdev->dev, "registering cpu dais failed\n");
		snd_soc_unregister_platform(&pdev->dev);
	}
	return ret;
}

static int sst_platform_remove(struct platform_device *pdev)
{

	snd_soc_unregister_component(&pdev->dev);
	snd_soc_unregister_platform(&pdev->dev);
	dev_dbg(&pdev->dev, "sst_platform_remove success\n");
	return 0;
}

#ifdef CONFIG_PM_SLEEP

static int sst_soc_prepare(struct device *dev)
{
	struct sst_data *drv = dev_get_drvdata(dev);
	struct snd_soc_pcm_runtime *rtd;

	if (!drv->soc_card)
		return 0;

	/* suspend all pcms first */
	snd_soc_suspend(drv->soc_card->dev);
	snd_soc_poweroff(drv->soc_card->dev);

	/* set the SSPs to idle */
	list_for_each_entry(rtd, &drv->soc_card->rtd_list, list) {
		struct snd_soc_dai *dai = rtd->cpu_dai;

		if (dai->active) {
			send_ssp_cmd(dai, dai->name, 0);
			sst_handle_vb_timer(dai, false);
		}
	}

	return 0;
}

static void sst_soc_complete(struct device *dev)
{
	struct sst_data *drv = dev_get_drvdata(dev);
	struct snd_soc_pcm_runtime *rtd;

	if (!drv->soc_card)
		return;

	/* restart SSPs */
	list_for_each_entry(rtd, &drv->soc_card->rtd_list, list) {
		struct snd_soc_dai *dai = rtd->cpu_dai;

		if (dai->active) {
			sst_handle_vb_timer(dai, true);
			send_ssp_cmd(dai, dai->name, 1);
		}
	}
	snd_soc_resume(drv->soc_card->dev);
}

#else

#define sst_soc_prepare NULL
#define sst_soc_complete NULL

#endif


static const struct dev_pm_ops sst_platform_pm = {
	.prepare	= sst_soc_prepare,
	.complete	= sst_soc_complete,
};

static struct platform_driver sst_platform_driver = {
	.driver		= {
		.name		= "sst-mfld-platform",
		.pm             = &sst_platform_pm,
	},
	.probe		= sst_platform_probe,
	.remove		= sst_platform_remove,
};

module_platform_driver(sst_platform_driver);

MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:sst-mfld-platform");